Tonus (トヌス Tonusu) was the original ancestor of the House of Tonus. Known as The Siren, she was a master of sound manipulation and music magic, able to influence others with music as well as lure and hypnotize others with her melodic song. Her sacred relic was the Flute of Tonus.
- Tonus derives from the Latin word tonus, meaning "sound, tone".
|Head of the House of Tonus|| Succeeded by|
Unknown, eventually Melody the Nightingale